After doing a bit of research I found something interesting.
Ni-dominants are usually cast as the villains in fiction. If they're not outright villains, usually the best they get is a distrusted position on the hero's side. Now, I saw a theory about how this bias could have been formed. If we take that American society is mainly based on ESTJ type (now don't attack me on this one, this is a generalization), then Ni would be in the 'deceiving' role to society and would make an easy target for a villain, or at least a character to be distrusted. Whether the writer be ESTJ or not, the archetype of a deceptive character with dom Ni would be so ingrained into society and just so available that it would end up happening a lot.
I've been studying villains for a while, so I thought this was interesting because it made a lot of sense.
So, what do you think? Archetypes for MBTI were partly derived from literary archetypes, but can the reverse be true? Or is this based on a fundamentally flawed premise, and the reason why there are so many Ni villains is totally different?